Grinder



Aug. 16, N

GRINDER Filed Dec. 27, 1929 5 Sheets-Sheet l INVENTOR. 5 /4 723 A azy BYAug. 16, 1932. LANG 1,872,469

GRINDER Filed Dec. 27, 1929 5 Sheets-Sheet 2 INVENTOR. 5 /472; LazyATTORN F. LANG Aug. 16 1932.

GRINDER a Sheets-Shet 5 Filed Dec. 27, 1929 INVENTOR. Wag; Lazy 5) m I yATT Rli i the manufacture-of brick and-like products;

' sive to manufacture.

Patented Aug. 16, 1932 FBA'NZLANG; ossucynus, onro, rissrenon TO w. A.mnnELLooMPAmr oF.BncYRus.

onro, 'a conronATIoN or 02:10

} GRINDER.

Application filedDece mber 27, 1929. Serial'No. 416,839...

This invention, relating as: indicated to grinders, has specificreference'to grinders commonly employed in reducing clay, hard shale,etc, to a suitable fineness preparatory to Grinders for the abovepurpose as now con structed are excessively heavy, take up unreasonableamounts of floor space, and "are generally constructed in a loosely knitfashion 1 so that the various operating parts are sub ject to unusualamounts of wear and the machine generally is cumbersome beyond the pointwhere a quiet and efficient operation of the grinding'machine ispossible. In the construction of such'grinders the grinding operation isperformed by a plurality of exceptionally heavy mullers whicharerotatably supported and rest upon a rotating bed or an. The materialtobe round is fedonto the rotating pan, and in passing under the mullersis crushed to asuitable fineness.

Grinders as now constructed have the shaftf by which the revoluble panis driven and supported, revolubly supported on a: step or suitablebearing positioned in the pitbelow' the revolu'ble pan. The bearing foraxially supporting the shaft when so 130- sitioned'in the pit under therevoluble pan is in direct" communication. with alliof the dirt, dustand ground material. which is discharged from the revoluble pan andtherefore the life of such bearing is consequently relatively short. tis an object of my invention to provide a grinder in whi-ch the rev',-.loluble' pan is axially supported by a bearing lying above the panand out OfithQ/ZOIIG of deteriorating elements. I

A further dlsadvantage inthe construction of grinders now commonlyemployed is that the supporting frame for the grinder consists" mainlyof wide sprawling legs which lmw terially interfere with free and readyaccess to the grinding mechanism proper, and which. in'addition areexcessively heavy and expen- It'is an object ofinyj invention. toprovide a supporting frame structure for a grinder which shall be compact, rigid and, furnish all the necessary. requirements of'a good framestructure having the added advantage of low cost .of'lnanufac type abovedescribed is that when themai terial to be-ground. is fed ontotherevol'uble ture, as well as ease and simplicity of assembly. Themullers above referredto, which are revolublycarried by the'grinding:pan, have,

. in structures heretofore" employed, been di 65 rectly supported by therevoluble panan'd' consequently when such mullers pass over the roughmaterial; on such pan the entire mechanism is subjected: to aconsiderable amount: of unreasonable shock or impact 'destructive to theentire grinding mechanism; I It is an object of'my inventiontoiprovide-a. means for supporting such:mullers Withree spect to therevoluble pan thata considerable portion of the destructive shock. orimpact, due to the operation of such mullers, isiem tirely obviated. r

.A further source of considerable incon-- venience inthe operationofgrinders of 'the panthe muller which first receives such materialzisapt'to-become choked and the entire operation of the grinding. machine:inters fered with. In order'that the materialto be" ground shall bereceived" in equal quantities by the-respective mullers on the revolublepan: 1 have provided i a means wherebye sucheven:; distribution may beeffectedand the'efliciency: of the grindingmechanism. appreciably-in:creased. i l

. In thegrinding of dry. or evenwetclay shale, etc., considerable dustis-ra-ised during: the grinding. process, andathis dust has'inthemachines now commonly employed, caused g excessive Wear on the operatingparts of'such machine to'the end that the life of the variousoperating'parts was relatively short, necessitating frequent andexpensive: replacement of" parts, which also interferedv with: the, continuous operation of the grinder. Itii'safurther obj ect ofmyinventionxto provide 'a'struc-r turein which the various operating partsare so shieldedfrom the dust an'dldirtinithe air so asto'appreciably'add were quietness of? the operation of'the machine" asWellv as: at

lengthening: of the life of the various operat ing-parts'.

To the accomplishment of the foregoing and related ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the claims; the annexed drawings and the followingdescription setting forth in detail certain structures embodying theinvention, such disclosed means constituting, howeveig'but one ofvarious mechanical forms in which the of the invention may be used.

In said annexed drawings: a

Fig. 1 is a part sectional plan View of the grinder comprising myinvention; Fig. 2 is a half section half elevation of the grinder shownin Fig. 1; and Fig. 3 is a part section part elevation of the grindertaken on a plane substantially at right angles to the view shown in Fig.2.

Referring more specifically to the draw ings, and more especially toFigs. 1 and 3, the grinder here illustrated consists of substantiallybell-shaped complementary elements 1 and 2, which consist of reinforcedlegs 3, 4, 5"and 6 formed integrally therewith, which-serve as a mainsupporting means for the entire structure. It will be noted in thisconnection that the legs 5 and 6 above referred to are formedofcomplementary elements, integral with each of the sections 1 and 2. The

principle sections 1 and 2 are removably secured to each other by meansof the bolts 7 so that when such sections are so united they present asubstantial bell-shaped body, as shown in Figs. 2 and 3. The supportinglegs 3, 4, 5 and 6 are suitably cross-braced by means of webs 8 and 9which are so positioned as not to interfere with the ready access totheinterior of the grinding mechanism. The sections 1 and 2 have cross bars10 and 11' formed integrally I therewith at their upper portions, asmost clearly. shown in Fig. 1, which cross bars, when the sections 1 and2 are in juxtaposition, provide a support for the hollow member 12which. depends from the supports into the body'of the bell-shaped frame.Positioned within, and upon the top of the bell-shaped body, isadome-shaped member 13, which is removably secured to the body by meansof the bolts 14'and has an auxiliary cover 15 rem'ovably secured theretobymeans of the bolts 16. The dome-shaped cover 13, as most clearly shownin Fig. 2, is adapted at 17 to revolubly support the drive shaft 18 andits associated driving mechanism. The drive shaft .18 isterminally'supportedby friction reduc: ing bearings 19, which arerigidly mounted in the bearing bracket 20 formed integrally with thedome-shaped member 13and is, ad-

jacent its opposite end 21, revolubly support-' l ed by the frictionlessbearings 22 which are mounted in the block 23 carried by the extendingarm or bracket 24 formed integral with the bell-shaped body adjacent thesupporting leg 3. The shaft 18-has rigidly secured theretoadrive pulley25 by means of the key 26. Associated with the shaft 18 intermediatelythe bearings 19 and 22 is a suitable clutch mechanism 27 which, whenactuated by the lever 28, may effect driving connection between theshaft 18 and the driving pinion 29 coaxially mounted thereon.A'lubricant duct 30 is provided for introducing a suitable lubricant tothe bearing 19.

Positioned within the dome-shaped member 13 is a supporting member 31which has I an annular ring 32 adapted to support the thrust bearing 33,which in turn supports the thrust element 34 and the thrust ring 35. Thethrust ring 35 is secured in a circumferential groove 36 in the upperportion 37 of theshaft 38. The shaft 38 has keyed thereto the hub 39 ofthe bevel driving gear 40 adapted tointermesh with the driving pinion 29carried by the driving shaft 18. The upper portion of the shaft 38 islaterally revolubly supported by means of the friction reducing bearing41 which is positioned intermediately the auxiliary cover 15 and theannular member 42. The annular member 42 has a circumferential skirt 43formed integrally therewith adapted to serve as a dirtexcluding meansfor the bearing 41 with the projecting ridge 44 formed integrally withthe auxiliary dome member 15.

The shaft 38 is coaxially positioned within the aperture 45 formedcentrally of the hollow vertically disposed member 12. The shaft 38 haskeyed thereto at its lower portion 46 the pan 47 by means of the key 48.The pan 47 is coaxially secured to the shaft 38 by means of the collar49 seated in the groove 50 formed in the terminal portion of this shaft.The pan 47 has removably secured thereto the wearing plate 51 by meansof the securing bolts 52. The shaft 38 is laterally supportedimmediatelyabove the pan 47 by means of the bushing 53 carried by the removablebody 54 secured to the lower end of the hollow member 12. The member 54has a circumferentially depending skirt 55 formed integrally therewithwhich, with the member 56, serves as a dust excluding means forprotecting the bushing 53 from the dust arising from the revoluble pan47. The member 56 is secured at its lower end by means of the bolts 57to the circumferentially extending flange member 58 and the annularmember 59, the annular member 59 being removably secured to the pan 47by means of the bolts 60. The oil-tight cavity formed by the dustexcluding members just referred to has an oil sight-gauge 61 securedtherein, by means of which the level of the oil in this cavity may beobserved through causes the lubricant from the trough 63 to flow bycentrifugal force through the conduit 65 onto the face 66 of the gear40. The lubricant is thence thrown against the side of the dome-shapedaperture and flows back to the trough 63. Some lubricant will find itsway down along the side of the shaft 38 through the bushing 53 and intothe receptacle therefor formed by the dust-excluding elements terminalportions.

above referred to. It will be seen that the entire operating mechanismis therefore at all times running in a bath of oil and is not subject tothe erosive action of the dust necessarily incidental to the grindingoperation. The mullers 67, while forming no part of this invention, willbe briefly described as formed of a plurality of segments encompassed bya tire 68, which is readilyreplaceable when worn as a result of thegrinding operation. The mullers 67 are revolubly mounted by means of thefriction reducing bearings 68 on the shaft 69 which, as most clearlyshown in Fig. 1, has crank arms 70 and 71 formed integrally therewith onits The crank arms 70 and 71 are suitably ournaled in the bearings 72and 73, respectively formed therefor in the legs 3 and 4 of thebell-shaped frame and the vertically disposed hollow member 12. Thehollow member 12 and the supporting legs referred to havespring-receiving brackets 74 and 75 formed integrally therewith, as mostclearly shown in Fig. 2, which secure the springs 76 and 77 carrying thesupporting members 78 and 79. These springs and their associatedsupporting members sustain the arms 70 and 71 sufiiciently so that whenno material is in the pan the mullers 67 will lightly rest on the plates51.

Circumferentially disposed above the pan 47 is a ringlike member 80which is adjustably supported from the member 81 by means of the screws82 and 83. The member 80 has a wear plate 84 removably secured theretoby means of the bolts 85. The purpose of the member 80 and its associatewear plate 84 is to regulate the fineness of the materials which isdischarged from the revoluble pan 47. By positioning the wear plate 84closer to the surface of the rotating table the material which passesfrom the rotating table thereunder, due to centrifugal force, can beregulated to the desired fineness.

As most clearly shown in Fig. 1, positioned along the side of thefeeding ends of the respective mullers are scraper elements 86 supportedby the brackets 8? which are removably and adjustably secured to theside frame of the grinder. These brackets supporting the scrapers, areindependently adjustable, the amount of material fed under each of therespective mullers can be accurately regulated to prevent the mulleradjacent the feed chute from receiving more than its share of thematerial to be ground.

It will be apparent from I the; above described construction that. the?grinderr com-- prising my. invention has: as: its? salient; few-- turesthe axially 7 supported" grinding; pan:

supported at a point above-.theigrinding area 70 providing a means forreadily replacing'thewearing edge of such meansso. that the ex- Icessive wear necessarily incidental-to the passage of the groundmaterial" thereunder. will not necessitate the replacement ofthe entirebody Jof'the material discharge regulatingi means. Itwill furtherbenotedthatthecon' struction of the scrapers by m'eansofwhich. the material tobe groundis fed to the respec tive mullers are adaptableto readyandeasy' adjustment sothat when .the p-an'isrevolving; in the directionofthe: arrow on Fig.. l the" left-hand muller, as. shown in this figure,

will not. receive more than its shareof thematerialto beground, tlierebypreventing the possibility of a chokingr of this muller due. to theentire stream of the raw materiallpassr. ing thereunder. equalizing thestreampassing under the respective. mullers notonly is the. quality-ofthe. groundmaterial materially, enhanced, but' 'the powerconsumptionof'the grinder as a wh0le..is.:decreased The structure of the grindercomprising my invention is likewise. particularly advantageous from thestandpoint. ofientirely doing; away with right andQleft-handparts,whichare a constant source'of annoyance and inconvenience; not only intheerection of sucli. grinders, but in thereplacement offhroken. or. wornparts. On the whole, a grinder constructed according to the. principlesoffmy;

invention ismuch lighter than-a construction in accordance with thecommon types now employed'anda machine which is superior from thestandpoint of rigidity as well'as longevity" of thevarious operableparts is'attained:

Other modes of applyingtlie principle of my invention may be employedinstead of the one explained, changes being made asregards the mechanismherein disclosed, providedth'e' means stated by any of the followingclaims or the equivalent of such stated means-be employedi I thereforeparticularly point out and dis tinctly, claim as-my invention --l. Inagrinding mill, the combination of a supporting frame including pluralsupple mentary elements adapted to form ahollow bell-shaped body havingspaced supporting legs; a cover for said elements; a revoluble pan;reducing agencies cooperating with said pan; a verticallydisposed shaftfor supporting and driving said pan,v and means associated withsaidcover for axially and laterallyfsupporting said shaft. v r

2. In agrinding'mill, the combination of asupporting frame includingplural supplementary elements adapted to form a hollow bell-shaped bodyhaving an axiallydisposed :hollow member; a cover for said body; a

revoluble pan; reducing agencies carried by said pan; a verticallydisposed shaft for supporting and driving "said pan positioned withinsaid hollow member; and means associated with said cover fOr axially andlaterally supporting said shaft.

' 3. In a grinding mill, the combination of a supporting rame'includingplural supplementar-y elements adapted to form a bellshaped body havingan axially 1 disposed hollow member; a cover for said body; arevoluble'pan; reducing agencies carried by said pan; a verticallydisposed shaft for supporting and driving said pan positioned withinsaid hollow member; means associated with said hollow member forlaterally supporting said shaft ;'and means associated with said coverfor axially and laterally supporting'said shaft.-

4. In a grinding mill, the combination of a supporting frame includingpluralsupplementary elements adapted to form a bellshaped body having anaxially disposed l10llow member; a cover for said body; a revoluble pan;reducing agencies carried by said pan; a vertically disposed shaft forsupporting' and driving saidpan positioned within said hollow member;means associated with said cover for axially and laterallysupportingsaid shaft; a gear wheel mounted on said shaft and enclosedsaid cover ;a lubricant trough in s aidcover positioned coaxially withsaid shaft; and means associated with said gear wheel for raisinglubricant from said trough to the wearing surfaces thereof upon therotation of said gear.

5. Ina grinding mill, the combination of plural complementary framemembers which when assembled form a hollow bell-shaped frame;a rotatabletable, a holow frame positioned coaxi'aly Within said bell, a shaft forrotatably supporting said table, means associated with saidhollow frameand said bell for supporting and driving said shaft, and mullerssupported by said hollow frame and said bell over said table Signed byme, this 20th day of December, 1929.

FRANZ LANG.

